[z/OS] Skip character conversion for ASCII streams

When applications are invoked with execFile the executable
name is passed as an absolute path to the Node runtime,
in order to detect if its an ascii application we need to
strip the path and extract the application name

src/process_wrap.cc

@@ -5,6 +5,7 @@
 
 #include <string.h>
 #include <stdlib.h>
+#include <regex>
 #ifdef __MVS__
 #include <unistd.h> // e2a
 #endif
@@ -65,12 +66,22 @@ class ProcessWrap : public HandleWrap {
                    AsyncWrap::PROVIDER_PROCESSWRAP) {
   }
 
-  static bool isAsciiPgm(const char *pgmName) {
-    const char * AsciiPgms[2] = { "git", "python"};
+  static bool isAsciiPgm(const char *pgm) {
+    const char * pgmName = pgm;
+    const char * AsciiPgms[2] = { "git", "python2"};
+    std::cmatch cm;
+    std::regex absolutePath("^.*\/([^/]*)$");
+    if (std::regex_match(pgmName,cm,absolutePath)) {
+        pgmName = cm[1].str().c_str();
+        if (cm.size() > 2) {
+            return false;
+            }
+    } 
+
     for (int pgId = 0 ; pgId < 2; pgId++) {
-      if (strcmp(AsciiPgms[pgId],pgmName) == 0) {
-        return true; 
-      }
+       if (strcmp(pgmName,AsciiPgms[pgId]) == 0) {  
+           return true;
+       } 
     }
     return false;
   }